Home / 645,178.72-890,068.08-403,039.84

Finding the Fourth Proportional to 645,178.72, 890,068.08 and 403,039.84

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Solution

The fourth proportional to 645,178.72, 890,068.08 and 403,039.84 is: 556,020.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,178.72 : 890,068.08 = 403,039.84 : x
  2. Step 2: Convert to fraction form
    645,178.72/890,068.08 = 403,039.84/x
  3. Step 3: Cross multiply
    645,178.72x = 890,068.08 × 403,039.84
  4. Step 4: Simplify right side
    645,178.72x = 358,732,896,552.31
  5. Step 5: Solve for x
    x = 358,732,896,552.31/645,178.72
  6. Step 6: Final answer
    x = 556,020.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.